PNG vs JPG vs WebP: Which Image Format Should You Use?

The single biggest divide between these formats is how they compress. Lossy formats (JPG, and WebP in lossy mode) permanently throw away image data the eye is unlikely to miss, which makes files dramatically smaller but slightly degrades quality — and re-saving repeatedly compounds that loss. Lossless formats (PNG, and WebP in lossless mode) compress without discarding any pixel data, so the image is pixel-perfect but the file is larger.

This is why a detailed photograph looks fine as a JPG at a fraction of the size, but a screenshot of text or a logo with sharp edges looks noticeably worse as a JPG — lossy compression smears crisp edges and solid-color areas, creating visible halos and specks. Those same images stay razor-sharp as PNG.

JPG cannot store transparency at all — every JPG has a solid rectangular background, which is why a logo saved as JPG shows up with an ugly white box behind it. If you need a transparent background (logos, icons, product cutouts, overlays, watermarks), you need PNG or WebP.

PNG supports a full 8-bit alpha channel, meaning smooth, partial transparency and clean anti-aliased edges. WebP supports transparency too, and combines it with better compression, so a transparent WebP is usually smaller than the equivalent PNG. If someone hands you a transparent PNG that needs a solid background for a form or print, converting with PNG to JPEG flattens it onto white; going the other way, JPEG to PNG gives you a lossless PNG copy to edit.

Size ranking depends entirely on the image content, but general patterns hold. For a typical photograph, WebP is usually the smallest, JPG is close behind, and PNG is by far the largest — often 3-5x bigger than JPG for the same photo, because lossless compression can't discard the millions of subtle color variations in a photo.

For flat graphics with few colors — logos, icons, simple diagrams — the order flips. PNG compresses these efficiently and stays sharp, WebP is smaller still, and JPG both bloats the file and adds artifacts. So there's no universally smallest format; it depends on whether the image is a continuous-tone photo or a flat graphic.

Match the format to the job rather than defaulting to one for everything.

JPG and PNG are the safest choices — they've been universally supported across every browser, operating system, email client, and image editor for decades. You can send them anywhere and they'll open.

WebP is now supported by all modern browsers (Chrome, Firefox, Safari, Edge) and is excellent on the web, but it still trips up in places: some older apps, older versions of Photoshop, certain email clients, social-media uploaders, and print services either won't open WebP or won't accept it as an upload. If a site rejects your WebP or an editor won't open it, convert it to JPG with the WebP to JPG tool — it runs client-side, so nothing is uploaded to a server.

A few conversion rules keep quality intact. Converting PNG to JPG discards transparency and applies lossy compression, so only do it for photos or when you specifically want a smaller flat image — not for logos you'll keep editing. Converting JPG to PNG with JPEG to PNG won't restore detail the JPG already lost, but it gives you a lossless working copy that won't degrade further as you edit. Converting WebP to JPG or PNG is the usual fix for compatibility problems.

Whatever format you land on, size still matters for sharing and web use. Run the final image through our image compressor to shrink JPG or WebP files with minimal visible loss, or use the compress-to-KB tool when a form or platform enforces a strict upload limit. All of these tools process images directly in your browser — no accounts, no watermarks, and no files leaving your device.